Q. What is the self-inductance of a coil which produces 5 V when the current changes from 3 A to 2 A in one millisecond?
A) 5000 H
B) 5 mH
C) 50 H
D) 5 H
Explanation
(b) $L = \ \frac{e}{di/dt} = \frac{edt}{di} = \frac{5 \times 10^{- 3}}{(3 - 2)}$H = 5 mH
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.